loftþrýstingsmælir
Loftþrýstingsmælir, also known as a barometer, is an instrument used to measure atmospheric pressure. Atmospheric pressure is the force exerted by the weight of the air in the atmosphere above a given point. Barometers are essential tools for meteorologists to forecast weather patterns, as changes in atmospheric pressure are often indicative of approaching weather systems.
There are two primary types of barometers: mercury barometers and aneroid barometers. A mercury barometer consists
The unit of measurement for atmospheric pressure is typically hectopascals (hPa) or millibars (mb) in meteorology,
Barometers have a long history, with the first practical barometer invented by Evangelista Torricelli in 1643.